This is a note to let you know that I've just added the patch titled
wifi: mac80211: accept STA changes without link changes
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-mac80211-accept-sta-changes-without-link-change.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 88ca627854dce49af679eb97d3f70fbcebcc6506
Author: Johannes Berg <johannes.berg@xxxxxxxxx>
Date: Sat Jul 23 22:08:49 2022 +0200
wifi: mac80211: accept STA changes without link changes
[ Upstream commit b303835dabe0340f932ebb4e260d2229f79b0684 ]
If there's no link ID, then check that there are no changes to
the link, and if so accept them, unless a new link is created.
While at it, reject creating a new link without an address.
This fixes authorizing an MLD (peer) that has no link 0.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index e5239a17a875..65f34945a767 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1610,6 +1610,18 @@ static int sta_link_apply_parameters(struct ieee80211_local *local,
rcu_dereference_protected(sta->link[link_id],
lockdep_is_held(&local->sta_mtx));
+ /*
+ * If there are no changes, then accept a link that doesn't exist,
+ * unless it's a new link.
+ */
+ if (params->link_id < 0 && !new_link &&
+ !params->link_mac && !params->txpwr_set &&
+ !params->supported_rates_len &&
+ !params->ht_capa && !params->vht_capa &&
+ !params->he_capa && !params->eht_capa &&
+ !params->opmode_notif_used)
+ return 0;
+
if (!link || !link_sta)
return -EINVAL;
@@ -1625,6 +1637,8 @@ static int sta_link_apply_parameters(struct ieee80211_local *local,
params->link_mac)) {
return -EINVAL;
}
+ } else if (new_link) {
+ return -EINVAL;
}
if (params->txpwr_set) {
